<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <!-- link 引入外部样式表，rel：关系，样式表 -->
  <link rel="stylesheet" href="./my.css">
  <title>CSS 引入方式</title>
</head>

<body>
  <p>这是p标签</p>
  <!-- 行内，style="CSS 属性" -->
  <div style="color: green; font-size: 30px;">这是div标签</div>
</body>

</html>